Turns out, trashing your profits and your reputation has never been easier. Just put out a Groupon (Living Social, whatever). Three scientists from Boston University and Harvard analyzed 7 million Yelp reviews, finding that businesses...

Advertising is a lot like fire. It can heat up your home – or burn it to the ground. And, even though I occasionally talk with owners who might prefer to see their pizzeria burn to the ground… most are looking to heat up sales.